With the GAME deal though we see nothing in the small print that would preclude you from trading in an Xbox 360 version to get a PlayStation 4 version – or a PlayStation 3 game to get an Xbox One version.

Whether GAME will actually honour that we’ll probably have to wait and see though because neither Sony nor Microsoft are likely to be too keen on the idea.

The offer ends on Christmas Eve, so no waiting till the sales, and it only works if you trade the games in at a shop – you can’t do it online. Beyond that though there seem to be no strings attached.

Since we already know the launch line-up for the PlayStation 4 though there are other cross-format games that are currently not covered by any deal, namely Assassin’s Creed IV, Watch Dogs, and Just Dance 2014 from Ubisoft; Lego Marvel Super Heroes from Warner Bros.; Need For Speed: Rivals, Madden NFL 25, and NBA Live 14 from EA; NBA 2K14 from 2K Sports; and Skylanders: SWAP Force from Activision.

At Gamescom Sony announced that Activision, EA, Ubisoft, and Warner Bros. were all working with them on the scheme, which suggests almost all of these games could be discounted on the PlayStation 4 even without using GAME.